Pivot joint

A pivot joint for a robot, comprising:

• a double-acting pneumatic pivot actuator, which has a first working chamber with a first working port and a second working chamber with a second working port, and
• further comprising a valve arrangement for a safety-related pneumatic control of the pivot actuator, having a first valve group for a selective connection of the first working port to one of a pressurization port and an exhaust port, and having a second valve group for a selective connection of the second working port to one of the pressurization port and the exhaust port, and
• which valve arrangement comprises a safety valve which is connected to the first working port and to the second working port and which is configured for blocking a connection between the first working port and the second working port in a blocking position and for releasing the connection between the first working port and the second working port in a release position,
• wherein the safety valve comprises an actuator acting on a valve member which is movably mounted in a valve housing of the safety valve for switching the valve member between the release position and the blocking position and wherein the safety valve comprises a spring acting on the valve member for prestressing the valve member into the release position.